Miscarriage Signs?

Has anyone ever miscarried without having any signs of miscarriage, such as bleeding or cramping? Last time I miscarried, I started bleeding from my sixth week everyday onward. I'm eight weeks today and have had no bleeding, but still have major anxiety about miscarrying again. Can I be comforted by the fact that I'm not bleeding this time or do many women miscarry without ever having bled? Thanks ladies!!